The “null coreerrorsopen failed mortal kombat new” error is frustrating but almost always fixable without reinstalling Windows. For a brand-new installation, the top three fixes are:
If you’re seeing this error on a new Mortal Kombat 1 (2023) install, also ensure your GPU drivers are up to date—some Unreal Engine 5 core components in MK1 require driver versions from mid-2024 onward.
Good luck, and finish him! → (And by that, we mean finish the error.)
Have another variation of “coreerrorsopen failed”? Screenshot it and post on the official WB Games support forum—mention “null core” for faster triage. null coreerrorsopen failed mortal kombat new
If you downloaded a new repack or crack of Mortal Kombat 1 (2023) from an untrusted source, this error is common. The crack may have altered the executable to skip online checks, but in doing so, broke the internal error handler. In that case, the only fix is to get a clean, legitimate copy or wait for an updated crack fix from reputable scene groups.
A “new” install may have missing or partial core files.
Steam:
Epic Games:
After verification, the game should rebuild Coalesced.ini and core files.
In practice, the game fails to write or read an internal error log, causing the message to appear instead of a normal crash report. The “null coreerrorsopen failed mortal kombat new” error
To avoid re-seeing “null coreerrorsopen failed” after a new MK patch:
Overlays (Discord, NVIDIA GeForce Experience, RivaTuner) can intercept CoreErrorsOpen calls.
If the error disappears, re-enable services one by one to find the conflict. If you’re seeing this error on a new